In most cases, you’ll be dealing with JPEG (or JPG) and PNG images. Both have their pros and cons.
JPEG Images
Photos should be saved in the JPEG format. This format compresses your images, so the files are usually smaller than PNG images.
PNG Images
Other graphics should be saved in PNG format. This applies to logos, infographics and images that contain a lot of text. PNG offers higher image quality than JPEG and presents colors and text in higher definition, so you can zoom in without losing quality.
PNG also supports transparent backgrounds, which is especially important for your logo. We recommend that you save PNGs in 24 bit instead of 8 bit, as this format supports higher quality images with a larger colour palette.